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AP Physics momentum

memorize.ai (lvl 286)

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Section 1

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6 years ago

Date created

Mar 1, 2020

Cards (9)

Section 1

(9 cards)

D

Front

The two blocks of masses M and 2M shown above initially travel at the same speed v but in opposite directions. They collide and stick together. How much mechanical energy is lost to other forms of energy during the collision? (A) Zero (B) ½ Mv2 (C) ¾ Mv2 (D) 4/3 Mv2 (E) 3/2 Mv2

Back

b

Front

A train is traveling east with constant speed vt. Two identical spheres are rolling on the floor of one train car. In the frame of reference of the train, the spheres are moving directly toward each other at one instant with the same speed vp parallel to the train's motion, as shown in the figure above. What is the velocity of the center of mass of the spheres in the frame of reference of the train and in the frame of reference of a person standing at rest alongside the train? a. train:0 person: 0 b. train:0 person:vt east c. train:vt east person: vp + vt east d. train: vp+vt east person: 0

Back

mv/(m+M)

Front

A railroad car of mass m is moving at speed v when it collides with a second railroad car of mass M which is at rest. The two cars lock together instantaneously and move along the track. What is the speed of the cars immediately after the collision?

Back

D

Front

A stationary object explodes, breaking into three pieces of masses m, m, and 3m. The two pieces of mass m move off at right angles to each other with the same magnitude of momentum mV, as shown in the diagram above. What are the magnitude and direction of the velocity of the piece having mass 3m?

Back

increase magnitude and changes direction

Front

a pendulum has a length and a bob of mass m. Which of the following is true of the linear momentum of the baby as it swings from its highest to lowest point? A.It remains constant because momentum is always conserved B. It increases in magnitude and changes direction C.It decreases in magnitude and change direction D. It is converted to angular momentum E. It is converted to kinetic energy

Back

c

Front

Back

Front

A spaceship and its shuttle pod are traveling to the right in a straight line with speed v, as shown in the top figure above.

Back

C

Front

Two carts, of mass 2m and m, approach each other head-on with the same speed v, as shown in the figure above. When the carts collide, they hook together. Assuming positive momentum is to the right, which of the following best represents the momentum of the cart of mass m as a function of time before and after the collision?

Back

Vc = V

Front

A spaceship and its shuttle pod are traveling to the right in a straight line with speed v, as shown in the top figure above. The mass of the pod is m, and the mass of the spaceship is 6m. The pod is launched, and afterward the pod is moving to the right with speed vp and the spaceship is moving to the right with speed vf, where vf > v , as shown in the bottom figure. Which of the following is true of the speed vc of the center of mass of the system after the pod is launched?

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